fix(web): show tag-filtered count in the header total

tests/memory-count.test.ts

@@ -10,4 +10,17 @@ describe("getDisplayedMemoryCount", () => {
   test("restores the store total when search is cleared", () => {
     expect(getDisplayedMemoryCount(false, 3, 120)).toBe(120);
   });
+
+  test("shows the filtered total when a tag filter is active", () => {
+    expect(getDisplayedMemoryCount(false, 3, 120, true)).toBe(3);
+    expect(getDisplayedMemoryCount(false, 0, 120, true)).toBe(0);
+  });
+
+  test("prefers search total when both search and tag filter are active", () => {
+    expect(getDisplayedMemoryCount(true, 2, 120, true)).toBe(2);
+  });
+
+  test("keeps the store total when no search and no tag filter", () => {
+    expect(getDisplayedMemoryCount(false, 3, 120, false)).toBe(120);
+  });
 });

web/src/App.tsx

@@ -148,7 +148,8 @@ export default function App() {
                       count: getDisplayedMemoryCount(
                         explorer.isSearching,
                         explorer.totalItems,
-                        explorer.statsTotal
+                        explorer.statsTotal,
+                        Boolean(explorer.selectedTag)
                       ),
                     })}
                   </span>

web/src/lib/memory-count.ts

@@ -1,7 +1,8 @@
 export function getDisplayedMemoryCount(
   isSearching: boolean,
   searchTotal: number,
-  storeTotal: number
+  storeTotal: number,
+  tagFilterActive = false
 ): number {
-  return isSearching ? searchTotal : storeTotal;
+  return isSearching || tagFilterActive ? searchTotal : storeTotal;
 }